Index: libcfa/src/concurrency/io/setup.cfa
===================================================================
--- libcfa/src/concurrency/io/setup.cfa	(revision 7ce88736e34bf185c4d55149f3117c28e91f9106)
+++ libcfa/src/concurrency/io/setup.cfa	(revision 4d85e47ce1d9a145f02b0ebdc7963bb786f6adc9)
@@ -359,5 +359,5 @@
 	}
 
-	void ^?{}( $io_arbiter & this ) {}
+	void ^?{}( $io_arbiter & mutex this ) {}
 
 	$io_arbiter * create(void) {
Index: libcfa/src/concurrency/io/types.hfa
===================================================================
--- libcfa/src/concurrency/io/types.hfa	(revision 7ce88736e34bf185c4d55149f3117c28e91f9106)
+++ libcfa/src/concurrency/io/types.hfa	(revision 4d85e47ce1d9a145f02b0ebdc7963bb786f6adc9)
@@ -125,5 +125,5 @@
 
 
-	struct __attribute__((aligned(128))) $io_context {
+	struct __attribute__((aligned(64))) $io_context {
 		$io_arbiter * arbiter;
 		processor * proc;
@@ -153,5 +153,5 @@
 	};
 
-	struct __attribute__((aligned(128))) $io_arbiter {
+	monitor __attribute__((aligned(64))) $io_arbiter {
 		__outstanding_io_queue pending;
 	};